The study load in ECs (1 EC= 28 hours) is indicated after the courses. Of course, it depends on prior knowledge whether this time is also needed when studying the course.
The time required for a student to complete the various components depends greatly on the time a student can devote to following and studying the various subjects. Mentioned study time is an indication and therefore depends on the personal situation. If you follow 1 course/5 ECTS per quartile, you will have the 3 certificates after 4 years.